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/*
passwd.c - NSS lookup functions for passwd database
Copyright (C) 2006 West Consulting
Copyright (C) 2006-2015 Arthur de Jong
Copyright (C) 2010 Symas Corporation
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "config.h"
#include <string.h>
#include <errno.h>
#include "prototypes.h"
#include "common.h"
#include "compat/attrs.h"
/* read a passwd entry from the stream */
static nss_status_t read_passwd(TFILE *fp, struct passwd *result,
char *buffer, size_t buflen, int *errnop)
{
int32_t tmpint32;
size_t bufptr = 0;
memset(result, 0, sizeof(struct passwd));
READ_BUF_STRING(fp, result->pw_name);
READ_BUF_STRING(fp, result->pw_passwd);
READ_INT32(fp, result->pw_uid);
READ_INT32(fp, result->pw_gid);
READ_BUF_STRING(fp, result->pw_gecos);
READ_BUF_STRING(fp, result->pw_dir);
READ_BUF_STRING(fp, result->pw_shell);
#ifdef HAVE_STRUCT_PASSWD_PW_CLASS
/* set the user access class to an empty string */
result->pw_class = result->pw_name + strlen(result->pw_name);
#endif /* HAVE_STRUCT_PASSWD_PW_CLASS */
return NSS_STATUS_SUCCESS;
}
#ifdef NSS_FLAVOUR_GLIBC
/* get a single passwd entry by name */
nss_status_t NSS_NAME(getpwnam_r)(const char *name, struct passwd *result,
char *buffer, size_t buflen, int *errnop)
{
NSS_GETONE(NSLCD_ACTION_PASSWD_BYNAME,
WRITE_STRING(fp, name),
read_passwd(fp, result, buffer, buflen, errnop));
}
/* get a single passwd entry by uid */
nss_status_t NSS_NAME(getpwuid_r)(uid_t uid, struct passwd *result,
char *buffer, size_t buflen, int *errnop)
{
NSS_GETONE(NSLCD_ACTION_PASSWD_BYUID,
WRITE_INT32(fp, uid),
read_passwd(fp, result, buffer, buflen, errnop));
}
/* thread-local file pointer to an ongoing request */
static TLS TFILE *pwentfp;
/* open a connection to read all passwd entries */
nss_status_t NSS_NAME(setpwent)(int UNUSED(stayopen))
{
NSS_SETENT(pwentfp);
}
/* read password data from an opened stream */
nss_status_t NSS_NAME(getpwent_r)(struct passwd *result,
char *buffer, size_t buflen, int *errnop)
{
NSS_GETENT(pwentfp, NSLCD_ACTION_PASSWD_ALL,
read_passwd(pwentfp, result, buffer, buflen, errnop));
}
/* close the stream opened with setpwent() above */
nss_status_t NSS_NAME(endpwent)(void)
{
NSS_ENDENT(pwentfp);
}
#endif /* NSS_FLAVOUR_GLIBC */
#ifdef NSS_FLAVOUR_SOLARIS
#ifdef HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN
static char *passwd2str(struct passwd *result, char *buffer, size_t buflen)
{
int res;
res = snprintf(buffer, buflen, "%s:%s:%d:%d:%s:%s:%s",
result->pw_name, result->pw_passwd, (int)result->pw_uid,
(int)result->pw_gid, result->pw_gecos, result->pw_dir,
result->pw_shell);
if ((res < 0) || (res >= (int)buflen))
return NULL;
return buffer;
}
#endif /* HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN */
static nss_status_t read_result(TFILE *fp, nss_XbyY_args_t *args)
{
READ_RESULT(passwd, &args->erange);
}
static nss_status_t passwd_getpwnam(nss_backend_t UNUSED(*be), void *args)
{
NSS_GETONE(NSLCD_ACTION_PASSWD_BYNAME,
WRITE_STRING(fp, NSS_ARGS(args)->key.name),
read_result(fp, args));
}
static nss_status_t passwd_getpwuid(nss_backend_t UNUSED(*be), void *args)
{
NSS_GETONE(NSLCD_ACTION_PASSWD_BYUID,
WRITE_INT32(fp, NSS_ARGS(args)->key.uid),
read_result(fp, args));
}
/* open a connection to the nslcd and write the request */
static nss_status_t passwd_setpwent(nss_backend_t *be, void UNUSED(*args))
{
NSS_SETENT(LDAP_BE(be)->fp);
}
/* read password data from an opened stream */
static nss_status_t passwd_getpwent(nss_backend_t *be, void *args)
{
NSS_GETENT(LDAP_BE(be)->fp, NSLCD_ACTION_PASSWD_ALL,
read_result(LDAP_BE(be)->fp, args));
}
/* close the stream opened with setpwent() above */
static nss_status_t passwd_endpwent(nss_backend_t *be, void UNUSED(*args))
{
NSS_ENDENT(LDAP_BE(be)->fp);
}
static nss_backend_op_t passwd_ops[] = {
nss_ldap_destructor,
passwd_endpwent,
passwd_setpwent,
passwd_getpwent,
passwd_getpwnam,
passwd_getpwuid
};
nss_backend_t *NSS_NAME(passwd_constr)(const char UNUSED(*db_name),
const char UNUSED(*src_name),
const char UNUSED(*cfg_args))
{
return nss_ldap_constructor(passwd_ops, sizeof(passwd_ops));
}
#endif /* NSS_FLAVOUR_SOLARIS */
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